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EMINENT LINK📚✨THE NEW FORCE 🎭

21 Nov, 19:49

Novdec core maths questions are available now ditto ditto

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EMINENT LINK📚✨THE NEW FORCE 🎭

21 Nov, 08:41

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EMINENT LINK📚✨THE NEW FORCE 🎭

21 Nov, 08:34

Novdec chemistry

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EMINENT LINK📚✨THE NEW FORCE 🎭

21 Nov, 06:40

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EMINENT LINK📚✨THE NEW FORCE 🎭

21 Nov, 06:39

3b) A mixture of aqueous calcium hydroxide and ammonium trioxonitrate(V) is warmed

I) identify the gas-evolved

II) write a balanced chemical equation for the reaction

III) write a balanced chemical equation for the reaction of the gas evolved in (I) with

@dilute H2SO4

B) CO2

C) Give one reason for each of the ff observations

I) SO2 shows more deviation from ideal gas behaviour than H2

II) the smell of nitrogen(II)oxide is difficult to detect

III) a balloon filled with helium deflates faster than one filled with oxygen

d) Name the crystalline allotrope of carbon that is
(I) most reactive
(II) can be used as an insulator
(III) less dense than air

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EMINENT LINK📚✨THE NEW FORCE 🎭

21 Nov, 06:39

Q2
a) Explain one disadvantage of equilibrium as an industrial process

b) State one disadvantage of cooling industrial plants with water containing Ca(HCO3)2.
Give a reason for the answer

C) Consider the ff reaction equation
CaCO3(aq) <=>CaO(s) + CO2(g)

I) State one condition necessary for the system to attain equilibrium

II) Explain why crushing limestone increases it rate of decomposition

III) What is meant by equilibrium position in a reversible reaction

Iv) what is the relationship between the enthalpy change for a forward reaction and that of its backward reaction

d) A current of 5.0 A is passed through CuSO4(aq) and AgNO3 (aq) connected in series for 1 hour 30mins. Calculate the mass of
(I) copper deposited
(II) silver deposited
[Cu = 63.5, Ag= 108.0, 1F=96500C]

e) I) Define the term Allotropy
(II) Name two allotropes of carbon

348

EMINENT LINK📚✨THE NEW FORCE 🎭

21 Nov, 06:39

*CHEMISTRY*
......................
1a) What is isomerism

b) Name two types of polymerization

c) Distinguish between a covalent bond and a dative bond

d) I) State Graham's law of diffusion
II) Write the mathematical expression for Graham's law

e) state 3 factors that will influence the preferential discharge of ions during electrolysis

f) Calculate the mass of magnesium oxide that would be obtained if 0.6g of magnesium is completely burnt in oxygen [ Mg=24.0, O=16.0]

g) Why is the electron affinity of fluorine lower than that of chlorine

h) Describe how a mixture of sand and sodium chloride could be separated in the laboratory

I) what is the difference between a concentrated solution of a base and a dilute solution of a base

j) Mention two salts that will decompose on heating to produce oxygen gas

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